Time light-extinguisher.



No. 817,840. 4PATE1\ITBD APR. 17, 1906. A. W. DYBR Mx. G. SPINNBY.

TIMELIGHT EXTINGUISHER.

APPLICATION FILED JAN. 20. 1905.

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f @MMWMQW -INVENTUFQ' \supply of UNITED iSTATES PATENT OFFICE.,

ALBERT W. DYER' AND ANDREW G.

ASSIGNORS, BY DIRECT SPINNEY, or PORTLAND,

AND MESNE ASSIGNMENTS, TowILLI'AfM` W. THOMAS, TRUSTEE, 0F PORTLAND,MAINE.

TIME` LIGHT-EXTINGUISHER. I

i Specification of Letters Patent.

.Patenten 17, 190e.

Application med January 29,1905. serial No. 241,927.

This invention relates to improvements in automatic gas-extinguishers, and is especiall adapted to that class of gas-burners whic are applied to street or outside lamps where it is necessa and customary that the same be extinguiShed at certain predetermined times.

It consists of a suitable case in which is mounted a clock. mechanism which drives a dial provided on its inner surface with a heart-cam, which cam when it comes in the proper position engages a latch which is norma ly in engagement with the cock of the burner, causes the latch to be withdrawn and the cock to be turned, thereby cutting off the gas and extinguishing the hght. l

It also consists in anovel arrangement of the interior of the casing, whereby gasmay be conducted to the burner without entering the chamber reserved for the driving mechanism, and in certain other details of construction which will be hereinafter more fully shown and described.

Inthe drawings herewith accompanying and forming a part of this application, Figure 1 represents a perspective view, parts being broken away, of our improved gas-extinguisher. Fig. 2 is a vertical section of the same, showing the novel means of conducting gas to the burner. Fig. 3 is a horizontal sectional view, the case being removed, of the clock-driving mechanism, dial, and cam.

In said drawings, A represents a case, which may be of anydesired size and any suitable configuration; but it is preferably constructed circular in form. with a substantially rectangular chamber B, in which is mounted in any suitable manner a clock-train C. Running between the chamber in which the clock-train is mounted and the exterior' of the casing and not in communication with the clock-train chamber is a duct F, which conducts the gasto the burner. (Not shown in thedrawings.) Mounted in the pipe E, upon which the burner is intend- Alug O, held in position by lFig. 3.

Said case is provided I ed to be mounted,is the usual cut-off cock D,-

which has two arms G and H substantially at right angles to each other and` lan offset I, surrounded by a spring J. The offset extends into the pipe below the burner and yis provided with an opening J and also serves as the 'shut-off. Mounted on one face of the'casing is a rectangular frame K, provided on'its'upper surface with a lug L, extending through `a suitable clamp M, said lug having its upper end beveled, as seen at N. r said rectangular frame is also provided with a means of clamp Py Also mounted below said'clanfp Pis'v a spring Q, which normally tends to keep said rectangular frame in an operative position. Also mounted von said lower clamp P is'ja hand R, the purpose of which willhereinafter:

be more fully set forth. Pivotallymou'nted in the face of the case is a dial S; having on its inner or back side a heart-cam T. Said dial is driven by a pinion U, whichconnectswithl the clock-trainniechanism, as seen at in, A

The dial is s'o arranged that it'willmake onev revolution y'in twenty-four hours and bears upon'its face characters froml 1"y y8o 'but the dial may be subdivided into* as many spaces as desired, the greater numto 24, both inclusive, each'space indicating anhour;

ber of spaces allowing the device to be set with more accuracy.

The heart-cam I is held against the back side of the dial by means of coil-spring T and nut or some other'suitable means and revolves with the dial. Said cam is also provided with a thumb-nut W, which projectsv outwardly throu h the frontface of the dial for the pur ose o turning said cam independently of t e dial. Also mounted on said thumb-nut is a hand X, so arranged as to indicate at all times the relative positionof the a ex of the heart-cam to the circumference of tfie dial.

The operation of our improved device is as follows: The cock F is turned so as to allow the gas to pass into the burner, and vthe arm His locked in position by the lug L. The cam is revolved to such a position on the dial as 4will correspond to the number of hours which the operator wishes the lamp to burn. This is determined in the following manner: If the number of the dial nearest the hand R on the clamp P indicates, forexample, fivel The lower part of` IOC -oclockand the dial is so arranged as to turn romnright to left and .it is desired that the light burn for seven hours, the cam is turned 'Softhat the indicator on 'the thumb-nut will 4'correspond-to the number 22. When the l .hand on the thumb-ruit registers with the `hand on the clamp P at the lower end of the case, the cam will be in its most extended-position and the latch will be forced down- 'yvardly, 'This releases the catch from the l The resiliency of the s ring will throw it back, thereby cutting H t e supply of gas 'able construction and adapted to run any length -of time, from a day to a week or longer,

if desired. I

' We do not Wish to limit ourselves to the exlvact construction as shown and described, for other e uivalent means may be used to ac-l ,complis 4the. same result withoutdeparting from the spirit of our invention. Having thus described our invention and fits use, weclaim- LfIn an 'automatic gas-extin sher, a"

suitable case vdivided into two in ependent non-communicating compartments, suitable driving mechanism in one of sald compartlments,the other compartment serving as a .means for conducting the. gas through said :casa-,a shaft mounted in said case and carrythereon a dial, said dial tightly fitting on 'said shaft and adapted to be driven With said shaft, a cam rigid y mounted on the end of said shaft and at the back side of said dial, the whole being driven by said driving mechanism, a spring cut-off, a latch capable of vertical movement on said case and operated by said cam to throw said cut-ofi', means for indicating the position of the cam and means for returning said springflatch to an operat1ve osition.

2. n an automatic gas extinguisher, a suitable case divided into two independent non-communicating compartments, suitable driving mechanism in one of said chambers, the other chamber serving as a means for conducting the gas through said case, a shaft mounted in said case and carrying thereon a dial having numerals on its surface and notches in its eriphery, s'aid dial tightly f`1tting on said s aft and adapted to be driven with thesaid shaft, a heart cam rigidly mounted on the inner end of said shaft and contiguous to the back side of said dial, the whole being driven by said driving mechanism, a spring cut-olf, a latch capable of vertical movement on said case and operated by said heart-cam to throw said cut-0H, means for indicating the position of the heart-cam and means for returning said spring-latch to an operative position.

`In testimony whereof we have hereto affixed our signatures, in presence of two subscribing witnesses-,this 17th day of January, v

ALBERT W. DYER.

ANDREW G. SPINNEY. In presence of- NATHAN CLIFFORD, EL'GIN C.'VERR1LL. 

